2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120 * support (see RFC 4279) to OpenSSL.
122 * No patent licenses or other rights except those expressly stated in
123 * the OpenSSL open source license shall be deemed granted or received
124 * expressly, by implication, estoppel, or otherwise.
126 * No assurances are provided by Nokia that the Contribution does not
127 * infringe the patent or other intellectual property rights of any third
128 * party or that the license provides you with all the necessary rights
129 * to make use of the Contribution.
131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
139 #include <openssl/lhash.h>
140 #include <openssl/rand.h>
141 #include "ssl_locl.h"
143 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
144 static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
145 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
147 SSL_SESSION *SSL_get_session(const SSL *ssl)
148 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
150 return(ssl->session);
153 SSL_SESSION *SSL_get1_session(SSL *ssl)
154 /* variant of SSL_get_session: caller really gets something */
157 /* Need to lock this all up rather than just use CRYPTO_add so that
158 * somebody doesn't free ssl->session between when we check it's
159 * non-null and when we up the reference count. */
160 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
164 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
168 int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
169 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
171 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
172 new_func, dup_func, free_func);
175 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
177 return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
180 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
182 return(CRYPTO_get_ex_data(&s->ex_data,idx));
185 SSL_SESSION *SSL_SESSION_new(void)
189 ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
192 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
195 memset(ss,0,sizeof(SSL_SESSION));
197 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
199 ss->timeout=60*5+4; /* 5 minute timeout by default */
200 ss->time=(unsigned long)time(NULL);
204 #ifndef OPENSSL_NO_TLSEXT
205 ss->tlsext_hostname = NULL;
206 #ifndef OPENSSL_NO_EC
207 ss->tlsext_ecpointformatlist_length = 0;
208 ss->tlsext_ecpointformatlist = NULL;
209 ss->tlsext_ellipticcurvelist_length = 0;
210 ss->tlsext_ellipticcurvelist = NULL;
213 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
214 #ifndef OPENSSL_NO_PSK
215 ss->psk_identity_hint=NULL;
216 ss->psk_identity=NULL;
221 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
224 *len = s->session_id_length;
225 return s->session_id;
228 /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
229 * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly
230 * until we have no conflict is going to complete in one iteration pretty much
231 * "most" of the time (btw: understatement). So, if it takes us 10 iterations
232 * and we still can't avoid a conflict - well that's a reasonable point to call
233 * it quits. Either the RAND code is broken or someone is trying to open roughly
234 * very close to 2^128 (or 2^256) SSL sessions to our server. How you might
235 * store that many sessions is perhaps a more interesting question ... */
237 #define MAX_SESS_ID_ATTEMPTS 10
238 static int def_generate_session_id(const SSL *ssl, unsigned char *id,
239 unsigned int *id_len)
241 unsigned int retry = 0;
243 if (RAND_pseudo_bytes(id, *id_len) <= 0)
245 while(SSL_has_matching_session_id(ssl, id, *id_len) &&
246 (++retry < MAX_SESS_ID_ATTEMPTS));
247 if(retry < MAX_SESS_ID_ATTEMPTS)
249 /* else - woops a session_id match */
250 /* XXX We should also check the external cache --
251 * but the probability of a collision is negligible, and
252 * we could not prevent the concurrent creation of sessions
253 * with identical IDs since we currently don't have means
254 * to atomically check whether a session ID already exists
255 * and make a reservation for it if it does not
256 * (this problem applies to the internal cache as well).
261 int ssl_get_new_session(SSL *s, int session)
263 /* This gets used by clients and servers. */
266 SSL_SESSION *ss=NULL;
267 GEN_SESSION_CB cb = def_generate_session_id;
269 if ((ss=SSL_SESSION_new()) == NULL) return(0);
271 /* If the context has a default timeout, use it */
272 if (s->session_ctx->session_timeout == 0)
273 ss->timeout=SSL_get_default_timeout(s);
275 ss->timeout=s->session_ctx->session_timeout;
277 if (s->session != NULL)
279 SSL_SESSION_free(s->session);
285 if (s->version == SSL2_VERSION)
287 ss->ssl_version=SSL2_VERSION;
288 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
290 else if (s->version == SSL3_VERSION)
292 ss->ssl_version=SSL3_VERSION;
293 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
295 else if (s->version == TLS1_VERSION)
297 ss->ssl_version=TLS1_VERSION;
298 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
300 else if (s->version == DTLS1_VERSION)
302 ss->ssl_version=DTLS1_VERSION;
303 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
307 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
308 SSL_SESSION_free(ss);
311 /* Choose which callback will set the session ID */
312 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
313 if(s->generate_session_id)
314 cb = s->generate_session_id;
315 else if(s->session_ctx->generate_session_id)
316 cb = s->session_ctx->generate_session_id;
317 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
318 /* Choose a session ID */
319 tmp = ss->session_id_length;
320 if(!cb(s, ss->session_id, &tmp))
322 /* The callback failed */
323 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
324 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
325 SSL_SESSION_free(ss);
328 /* Don't allow the callback to set the session length to zero.
329 * nor set it higher than it was. */
330 if(!tmp || (tmp > ss->session_id_length))
332 /* The callback set an illegal length */
333 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
334 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
335 SSL_SESSION_free(ss);
338 /* If the session length was shrunk and we're SSLv2, pad it */
339 if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
340 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
342 ss->session_id_length = tmp;
343 /* Finally, check for a conflict */
344 if(SSL_has_matching_session_id(s, ss->session_id,
345 ss->session_id_length))
347 SSLerr(SSL_F_SSL_GET_NEW_SESSION,
348 SSL_R_SSL_SESSION_ID_CONFLICT);
349 SSL_SESSION_free(ss);
352 #ifndef OPENSSL_NO_TLSEXT
353 if (s->tlsext_hostname) {
354 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
355 if (ss->tlsext_hostname == NULL) {
356 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
357 SSL_SESSION_free(ss);
361 #ifndef OPENSSL_NO_EC
362 if (s->tlsext_ecpointformatlist)
364 if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist);
365 if ((ss->tlsext_ecpointformatlist = OPENSSL_malloc(s->tlsext_ecpointformatlist_length)) == NULL)
367 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE);
368 SSL_SESSION_free(ss);
371 ss->tlsext_ecpointformatlist_length = s->tlsext_ecpointformatlist_length;
372 memcpy(ss->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
374 if (s->tlsext_ellipticcurvelist)
376 if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
377 if ((ss->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
379 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE);
380 SSL_SESSION_free(ss);
383 ss->tlsext_ellipticcurvelist_length = s->tlsext_ellipticcurvelist_length;
384 memcpy(ss->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
391 ss->session_id_length=0;
394 if (s->sid_ctx_length > sizeof ss->sid_ctx)
396 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
397 SSL_SESSION_free(ss);
400 memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);
401 ss->sid_ctx_length=s->sid_ctx_length;
403 ss->ssl_version=s->version;
404 ss->verify_result = X509_V_OK;
409 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len)
411 /* This is used only by servers. */
413 SSL_SESSION *ret=NULL,data;
416 data.ssl_version=s->version;
417 data.session_id_length=len;
418 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
420 memcpy(data.session_id,session_id,len);
422 if (!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
424 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
425 ret=(SSL_SESSION *)lh_retrieve(s->session_ctx->sessions,&data);
427 /* don't allow other threads to steal it: */
428 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
429 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
436 s->session_ctx->stats.sess_miss++;
438 if (s->session_ctx->get_session_cb != NULL
439 && (ret=s->session_ctx->get_session_cb(s,session_id,len,©))
442 s->session_ctx->stats.sess_cb_hit++;
444 /* Increment reference count now if the session callback
445 * asks us to do so (note that if the session structures
446 * returned by the callback are shared between threads,
447 * it must handle the reference count itself [i.e. copy == 0],
448 * or things won't be thread-safe). */
450 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
452 /* Add the externally cached session to the internal
453 * cache as well if and only if we are supposed to. */
454 if(!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
455 /* The following should not return 1, otherwise,
456 * things are very strange */
457 SSL_CTX_add_session(s->session_ctx,ret);
463 /* Now ret is non-NULL, and we own one of its reference counts. */
465 if (ret->sid_ctx_length != s->sid_ctx_length
466 || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length))
468 /* We've found the session named by the client, but we don't
469 * want to use it in this context. */
471 #if 0 /* The client cannot always know when a session is not appropriate,
472 * so we shouldn't generate an error message. */
474 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
476 goto err; /* treat like cache miss */
479 if((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0)
481 /* We can't be sure if this session is being used out of
482 * context, which is especially important for SSL_VERIFY_PEER.
483 * The application should have used SSL[_CTX]_set_session_id_context.
485 * For this error case, we generate an error instead of treating
486 * the event like a cache miss (otherwise it would be easy for
487 * applications to effectively disable the session cache by
488 * accident without anyone noticing).
491 SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
496 if (ret->cipher == NULL)
498 unsigned char buf[5],*p;
504 if ((ret->ssl_version>>8) == SSL3_VERSION_MAJOR)
505 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
507 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
508 if (ret->cipher == NULL)
513 #if 0 /* This is way too late. */
515 /* If a thread got the session, then 'swaped', and another got
516 * it and then due to a time-out decided to 'OPENSSL_free' it we could
517 * be in trouble. So I'll increment it now, then double decrement
518 * later - am I speaking rubbish?. */
519 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
522 if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
524 s->session_ctx->stats.sess_timeout++;
525 /* remove it from the cache */
526 SSL_CTX_remove_session(s->session_ctx,ret);
530 s->session_ctx->stats.sess_hit++;
532 /* ret->time=time(NULL); */ /* rezero timeout? */
533 /* again, just leave the session
534 * if it is the same session, we have just incremented and
535 * then decremented the reference count :-) */
536 if (s->session != NULL)
537 SSL_SESSION_free(s->session);
539 s->verify_result = s->session->verify_result;
544 SSL_SESSION_free(ret);
551 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
556 /* add just 1 reference count for the SSL_CTX's session cache
557 * even though it has two ways of access: each session is in a
558 * doubly linked list and an lhash */
559 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
560 /* if session c is in already in cache, we take back the increment later */
562 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
563 s=(SSL_SESSION *)lh_insert(ctx->sessions,c);
565 /* s != NULL iff we already had a session with the given PID.
566 * In this case, s == c should hold (then we did not really modify
567 * ctx->sessions), or we're in trouble. */
568 if (s != NULL && s != c)
570 /* We *are* in trouble ... */
571 SSL_SESSION_list_remove(ctx,s);
573 /* ... so pretend the other session did not exist in cache
574 * (we cannot handle two SSL_SESSION structures with identical
575 * session ID in the same cache, which could happen e.g. when
576 * two threads concurrently obtain the same session from an external
581 /* Put at the head of the queue unless it is already in the cache */
583 SSL_SESSION_list_add(ctx,c);
587 /* existing cache entry -- decrement previously incremented reference
588 * count because it already takes into account the cache */
590 SSL_SESSION_free(s); /* s == c */
595 /* new cache entry -- remove old ones if cache has become too large */
599 if (SSL_CTX_sess_get_cache_size(ctx) > 0)
601 while (SSL_CTX_sess_number(ctx) >
602 SSL_CTX_sess_get_cache_size(ctx))
604 if (!remove_session_lock(ctx,
605 ctx->session_cache_tail, 0))
608 ctx->stats.sess_cache_full++;
612 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
616 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
618 return remove_session_lock(ctx, c, 1);
621 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
626 if ((c != NULL) && (c->session_id_length != 0))
628 if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
629 if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions,c)) == c)
632 r=(SSL_SESSION *)lh_delete(ctx->sessions,c);
633 SSL_SESSION_list_remove(ctx,c);
636 if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
641 if (ctx->remove_session_cb != NULL)
642 ctx->remove_session_cb(ctx,r);
651 void SSL_SESSION_free(SSL_SESSION *ss)
658 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
660 REF_PRINT("SSL_SESSION",ss);
666 fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
671 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
673 OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);
674 OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);
675 OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);
676 if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
677 if (ss->peer != NULL) X509_free(ss->peer);
678 if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
679 #ifndef OPENSSL_NO_TLSEXT
680 if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname);
681 #ifndef OPENSSL_NO_EC
682 ss->tlsext_ecpointformatlist_length = 0;
683 if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist);
684 ss->tlsext_ellipticcurvelist_length = 0;
685 if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
686 #endif /* OPENSSL_NO_EC */
688 #ifndef OPENSSL_NO_PSK
689 if (ss->psk_identity_hint != NULL)
690 OPENSSL_free(ss->psk_identity_hint);
691 if (ss->psk_identity != NULL)
692 OPENSSL_free(ss->psk_identity);
694 OPENSSL_cleanse(ss,sizeof(*ss));
698 int SSL_set_session(SSL *s, SSL_SESSION *session)
701 const SSL_METHOD *meth;
705 meth=s->ctx->method->get_ssl_method(session->ssl_version);
707 meth=s->method->get_ssl_method(session->ssl_version);
710 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
714 if (meth != s->method)
716 if (!SSL_set_ssl_method(s,meth))
718 if (s->ctx->session_timeout == 0)
719 session->timeout=SSL_get_default_timeout(s);
721 session->timeout=s->ctx->session_timeout;
724 #ifndef OPENSSL_NO_KRB5
725 if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
726 session->krb5_client_princ_len > 0)
728 s->kssl_ctx->client_princ = (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1);
729 memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,
730 session->krb5_client_princ_len);
731 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
733 #endif /* OPENSSL_NO_KRB5 */
735 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
736 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
737 if (s->session != NULL)
738 SSL_SESSION_free(s->session);
740 s->verify_result = s->session->verify_result;
741 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
746 if (s->session != NULL)
748 SSL_SESSION_free(s->session);
753 if (meth != s->method)
755 if (!SSL_set_ssl_method(s,meth))
763 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
765 if (s == NULL) return(0);
770 long SSL_SESSION_get_timeout(const SSL_SESSION *s)
772 if (s == NULL) return(0);
776 long SSL_SESSION_get_time(const SSL_SESSION *s)
778 if (s == NULL) return(0);
782 long SSL_SESSION_set_time(SSL_SESSION *s, long t)
784 if (s == NULL) return(0);
789 long SSL_CTX_set_timeout(SSL_CTX *s, long t)
792 if (s == NULL) return(0);
793 l=s->session_timeout;
794 s->session_timeout=t;
798 long SSL_CTX_get_timeout(const SSL_CTX *s)
800 if (s == NULL) return(0);
801 return(s->session_timeout);
804 typedef struct timeout_param_st
811 static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
813 if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
815 /* The reason we don't call SSL_CTX_remove_session() is to
816 * save on locking overhead */
817 lh_delete(p->cache,s);
818 SSL_SESSION_list_remove(p->ctx,s);
820 if (p->ctx->remove_session_cb != NULL)
821 p->ctx->remove_session_cb(p->ctx,s);
826 static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION *, TIMEOUT_PARAM *)
828 void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
834 tp.cache=s->sessions;
835 if (tp.cache == NULL) return;
837 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
838 i=tp.cache->down_load;
839 tp.cache->down_load=0;
840 lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
841 tp.cache->down_load=i;
842 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
845 int ssl_clear_bad_session(SSL *s)
847 if ( (s->session != NULL) &&
848 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
849 !(SSL_in_init(s) || SSL_in_before(s)))
851 SSL_CTX_remove_session(s->ctx,s->session);
858 /* locked by SSL_CTX in the calling function */
859 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
861 if ((s->next == NULL) || (s->prev == NULL)) return;
863 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))
864 { /* last element in list */
865 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
866 { /* only one element in list */
867 ctx->session_cache_head=NULL;
868 ctx->session_cache_tail=NULL;
872 ctx->session_cache_tail=s->prev;
873 s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);
878 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
879 { /* first element in list */
880 ctx->session_cache_head=s->next;
881 s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);
884 { /* middle of list */
885 s->next->prev=s->prev;
886 s->prev->next=s->next;
889 s->prev=s->next=NULL;
892 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
894 if ((s->next != NULL) && (s->prev != NULL))
895 SSL_SESSION_list_remove(ctx,s);
897 if (ctx->session_cache_head == NULL)
899 ctx->session_cache_head=s;
900 ctx->session_cache_tail=s;
901 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
902 s->next=(SSL_SESSION *)&(ctx->session_cache_tail);
906 s->next=ctx->session_cache_head;
908 s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
909 ctx->session_cache_head=s;
913 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
914 int (*cb)(struct ssl_st *ssl,SSL_SESSION *sess))
916 ctx->new_session_cb=cb;
919 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
921 return ctx->new_session_cb;
924 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
925 void (*cb)(SSL_CTX *ctx,SSL_SESSION *sess))
927 ctx->remove_session_cb=cb;
930 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx,SSL_SESSION *sess)
932 return ctx->remove_session_cb;
935 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
936 SSL_SESSION *(*cb)(struct ssl_st *ssl,
937 unsigned char *data,int len,int *copy))
939 ctx->get_session_cb=cb;
942 SSL_SESSION * (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl,
943 unsigned char *data,int len,int *copy)
945 return ctx->get_session_cb;
948 void SSL_CTX_set_info_callback(SSL_CTX *ctx,
949 void (*cb)(const SSL *ssl,int type,int val))
951 ctx->info_callback=cb;
954 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl,int type,int val)
956 return ctx->info_callback;
959 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
960 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
962 ctx->client_cert_cb=cb;
965 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509 , EVP_PKEY **pkey)
967 return ctx->client_cert_cb;
970 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
971 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
973 ctx->app_gen_cookie_cb=cb;
976 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
977 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len))
979 ctx->app_verify_cookie_cb=cb;
982 IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)